HERITABLE AND NON-HERITABLE DIFFERENCES 



No matter what the weights of the mother beans from any one Hne 

 were, the averages of their daughters are the same within the Hmits 

 of sampHng error. Even where the mother beans differed by as much 



TABLE 4 



FREQUENCIES OF BEANS (PHASEOLUS VULGARIS) OF 

 VARIOUS WEIGHTS, GROUPED INTO CLASSES CENTRED 

 ON THE WEIGHTS SHOWN (JOHANNSEN 1909) 



19 lines, 524 mother beans, 5,494 daughter beans. 



B. AVERAGE WEIGHTS OF DAUGHTER BEANS FOR THE 



VARIOUS CLASSES OF MOTHER BEAN IN NINE OF 



THE NINETEEN PURE LINES (JOHANNSEN 1909) 



as 40 cgs. this is still true. The lines differ, however, from one to 

 another, the heaviest averaging 64-2 cgs. over all daughter beans 

 and the lightest only 35-1 cgs. Thus the variation in bean weight 

 within a line was, as expected, non-heritable; the variation between 

 lines being at least in part heritable. 



63 



